Figure 1.
Cellular toxic effect of ginsenoside Rb1 on rat astrocytes by the MTT assay. Rat astrocytes were treated with the indicated concentration of ginsenoside Rb1, and the cellular viability was detected by the MTT assay. The viability of the control (PBS treatment) group was normalized as 100%. Each data point represents the mean of 4 independent assays. ▴P > .05 versus the control group; ∗P < .01 versus the control group. MTT = 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, PBS = phosphate-buffered saline.